clear the last nibble correctly

bbroder-algo · bbroder-algo · commit 4ad682dc1973 · 2023-09-05T15:44:51.000-04:00
diff --git a/crypto/statetrie/nibbles/nibbles_test.go b/crypto/statetrie/nibbles/nibbles_test.go
@@ -43,7 +43,7 @@ func TestNibblesRandom(t *testing.T) {
 		localRand.Read(data)
 		half := localRand.Intn(2) == 0 // half of the time, we have an odd number of nibbles
 		if half && localRand.Intn(2) == 0 {
-			data[len(data)-1] |= 0x0f // sometimes clear the last nibble, sometimes do not
+			data[len(data)-1] &= 0xf0 // sometimes clear the last nibble, sometimes do not
 		}
 		nibbles := MakeNibbles(data, half)
 

Original file line number	Diff line number	Diff line change
`@@ -43,7 +43,7 @@ func TestNibblesRandom(t *testing.T) {`
`43`	`43`	`localRand.Read(data)`
`44`	`44`	`half := localRand.Intn(2) == 0 // half of the time, we have an odd number of nibbles`
`45`	`45`	`if half && localRand.Intn(2) == 0 {`
`46`		`- data[len(data)-1] \|= 0x0f // sometimes clear the last nibble, sometimes do not`
	`46`	`+ data[len(data)-1] &= 0xf0 // sometimes clear the last nibble, sometimes do not`
`47`	`47`	`}`
`48`	`48`	`nibbles := MakeNibbles(data, half)`
`49`	`49`